OIE: Low pathogenic avian influenza (poultry), Chinese Taipei

OIE: Low pathogenic avian influenza (poultry), Chinese Taipei
submited by kickingbird at Apr, 11, 2011 23:50 PM from OIE

Information received on 11/04/2011 from Dr Kwo-Ching Huang, Chief Veterinary Officer and Deputy Director General, , Bureau of Animal and Plant Health Inspection and Quarantine Council of agriculture, Executive Yuan , Taipei, Chinese Taipei

Summary

Report type	Immediate notification
Start date	28/03/2011
Date of first confirmation of the event	07/04/2011
Report date	11/04/2011
Date submitted to OIE	11/04/2011
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	11/02/2011
Manifestation of disease	Sub-clinical infection
Causal agent	Low pathogenic avian influenza virus
Serotype	H7N3
Nature of diagnosis	Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Location(s)

CHIA-I (Xikou Township)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	920	21	0	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	2.28%	0.00%	0.00%	0.00%

* Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

After the H5N2 outbreak identified on 21 March 2011, an epidemiological and clinical investigation was conducted on the surrounding poultry farms within a 3-km-radius of the index farm. In this investigation, the notifiable avian influenza (NAI) viral infection was detected on a duck breeder farm and identified as H7N3 strain on 7 April 2011. Movement restriction was implemented on the farm immediately after the virus was detected. Clinical investigation on that farm was done and showed that the breeders were healthy and without abnormal mortality and dropping of egg production. The positive results of serological and virological tests confirmed this new outbreak. The pathogenicity assays of this virus isolate are on-going.

Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2010).

Control measures

Measures applied	Quarantine Movement control inside the country Screening Zoning Disinfection of infected premises/establishment(s) Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

Animal Health Research Institute (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	haemagglutination inhibition test (HIT)	07/04/2011	Positive
Birds	reverse transcription - polymerase chain reaction (RT-PCR)	07/04/2011	Positive
Birds	virus isolation	07/04/2011	Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.

See Also:

http://www.oie.int

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